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-   -   ACC mono valve '90 300e (http://www.peachparts.com/shopforum/tech-help/53531-acc-mono-valve-90-300e.html)

bgods 12-30-2002 03:29 PM

ACC mono valve '90 300e
 
Engine coolant temperature climbs to 120_C, heater blowing cold air. seems as if coolant finally starts to flow across heater core because heater will start blowing hot and engine coolant temp gauge to ~100_C. Temperature up and down from ~100-120_C. Suspect ACC mono valve. Would like to hear how hard a job to replace on my 1990 300E.

J.HIDALGO 12-30-2002 06:24 PM

If it is the same as my 86...
 
buy the repair kit. Remove a few of screws and replace. It is next to the battery on my car. Parts shop or Fast Lane should have it.:cool:

ILUVMILS 01-01-2003 07:34 PM

Replace the thermostat.

pmizell 01-02-2003 03:19 AM

Unfortunately...
 
The mono valve repair kit J.H. mentions isn't available for the '90 M103 engine, you'd have to replace the whole valve. I think it's a pretty straightforward job to replace because it's very accessible ... although I'm pretty sure you'd have to drain your coolant system.

ILUVMILS 01-02-2003 11:01 PM

The coolant temp rises to 120C! Forget the mono-valve!


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